Stop motions of textile apparatus



. A ril 28, 1936. 1. BLUM 2,039,209

V STOP MOTIONS OF TEXTILE APPARATUS Filed April 24, 1933 2 SheetsSheet 1F29] [-79.3 179. A n d IB/um April 28, 1936. I. LUM 2,039,209

STOP MOTIONS OF TEXTILE APPARATUS Filed April 24, 1933 2 Sheets-Sheet 2I. B/um Patented Apr. 28, 1936 UNITED STATES PATENT OFFICE STOP 'MOTIONSOF TEXTILE APPARATUS Izchak Blum, Paris, France, assignor to SocietyComptoir dApparells Textiles, Socit i'Responsabilit Limite, Riedisheim,near Mulhouse (Haut-Rhin), France Application-April 24,1933, Serial No.667,721

In France May 26, 1932 1 Claim. (01. l39-268) ting the dropping of theblade to actuate the stop motion, mechanical, electrical or otherwise.

At present such blades, whether of the closed' or open type, are of flatand very thin metal and have formed therein an eye for the threading ofthe yarn. Figures 7, 8 and 9 of the annexed drawings show such a bladeb, and are inserted by way of explanation-Figure 7 being a side view;Figure 8 an edge view; and Figure 9 a cross section. Thread eye a is cutin the metal to form an orifice in the plane thereof; 11 is the usualbar on which the blade drops on breakage of the yarn c, which supportssuch blade.

With the form of eye shown disadvantages have been recognized. The yam cin its passage through such'an eye makes two distinct bends with twochanges of direction, with friction against the edges of the eye and theadjacent parts of the blade. This is clearly indicated in Figures 7 and9. Further, when for example a group of warps is cut, the blades mountedon the warps are huddled together-see the schematic view in plan ofFigure 10, which figure is also inserted by way of explanation-'and eachwarp, ,such as c for example, rubs not only on the edge of the eye ofits own blade I: but also against the lateral edges of the adjacentblades b and b The total result ofthese frictional contacts of threadand blade is a scratching or even breakages of yarns, and moreover alarge part of the sizing of warps is removed by the scraping contact,with consequent inconveniences and diiiiculties in the latermanipulation of the yarns.

Finally, there is the disadvantage that the blade due to the operation,already explained in which a yarn enters and leaves the eyea, takes a.position which is oblique to'the yarn which supports it and also isoblique to the stop rod operated by the falling of the bladei ativepositionof yarn, blade and stop rod prevents the blade from fallingproperly to perform its function when the yarn breaksr Theobject of thepresent invention is to provide means for the removal of thedisadvantages enumerated abo"e, and in accordance with such inventionthe ade, instead of being flat at This relthe eye and thus compellingayarn to twist as it goes-through the bladeeye, is itself distorted atthe point where the eye is situated so that the yarn will pass in astraight line through the eye.

By such construction the friction of the thread a passing through theeye of the blade is lessened. For afull understanding of the inventiontwo constructions of a blade according to such invention will now bedescribed by way of example, reference being had to the drawings anmnexed hereto wherein:

Figure 1 is an elevation-looking from the side of a machine in which itis mounted-of a blade of the closed type constructed according to thepresent invention! 1 Figure 2 is a horizontal section taken through theyarn eye of Figure 1;

Figures 3 and 4 are views corresponding to Figures 1 and 2 respectively,but showing a blade of the open type, with the present invention apgoplied thereto:

Figure 5 is an edge view of part of a blade according to Figures 1 and3;-and

Figure 6 shows in horizontal across section a group of bladesconstructed according to this in- 25 vention and mounted upon theiryarns.

Figures 7 to 10 inclusive. are given as before stated merely by way ofexplanation of existing blades, and form no part of this description ofthe present invention. They will not be further 30 referred to;

Figure 11 is an elevation of a further embodiment of the invention in anopen type blade;

Figure 12 is a fragmentary view on an enlarged scale of the eye of theblade shown in Figure 11; 3,

Figure 13 is a side view of the detail of Figure 12; and

Figure 14 is a view similar to that of Figure 11 but showing a blade ofthe closed type.

\ From an examination of Figuresl to 6 incluo sive of'the drawings itwill be clear that the I eye a of the blade I is surrounded by a zone ofwhich a part 2 is pushed forward and the other part 3 pushed in theopposite direction. The

parts 2 and S3 of the blade so deformed pro-g5 vide' bowed projectionsextending irom opposite faces of the blade, with the outer part of eachprojection forming a fiat surface parallel to the plane of the blade.The projections are flared outwardly toward the edges of the blade theblade 6 is viewed-Fiizure '5-an approxig

